GM Service Manual Online
For 1990-2009 cars only
Figure 1:

ECM Power, Ground and Serial Data


Object Number: 2012530  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
5 Volt Reference and Low Reference
B+ Bus - 2 of 2
B+ Bus - 2 of 2
ECM, Fuel Pump, Rear Main, RVC Sense and Trailer Fuses
Batt Main 2, Console Lighting, BCM Logic, Stop Lamps/Park Assist and IGNSW/Theft Fuses and Ignition Switch
PWR/TRN Bus - ECM 1, Emission 1 and REV/LOCK Fuses
IGN II/III Bus - Airbag, IGN Engine and Phone/Cruise
Batt Main 2, Console Lighting, BCM Logic, Stop Lamps/Park Assist and IGNSW/Theft Fuses and Ignition Switch
IGN II/III Bus - Airbag, IGN Engine and Phone/Cruise
ECM, Fuel Pump, Rear Main, RVC Sense and Trailer Fuses
Batt Main 2, Console Lighting, BCM Logic, Stop Lamps/Park Assist and IGNSW/Theft Fuses and Ignition Switch
G102 and G310
G102 and G310
Cooling Fans and Relays
Camshaft Position Sensor, MAP Sensor, Reverse Lockout Solenoid, EVAP Canister Purge Solenoid, Coolant Temp Sensor, MAF Sensor, Oil Level and Temp Sensor and Backup Lamp Switch
TCM and Transmission, Power, Ground, Serial Data, Inputs and Outputs
Pin Allocation
G102 and G310
G103, G110, G111 and G112 (6.0L)
G103, G106, G107, G108 and G109 (3.6L)
Engine Controls Schematic Icons
Batt Main 2, Console Lighting, BCM Logic, Stop Lamps/Park Assist and IGNSW/Theft Fuses and Ignition Switch
Instrument Cluster Power, Ground, Serial Data, Inputs and Outputs
Figure 2:

5 Volt Reference and Low Reference


Object Number: 2012532  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
Fuel Injectors
ECM Power, Ground and Serial Data
Figure 3:

Fuel Injectors


Object Number: 1962328  Size: FS
Master Electrical Component List
Fuel System Description
Control Module References
Odd Ignition Coils
5 Volt Reference and Low Reference
PWR/TRN BUS - EVCOIL/INJ Fuses
PWR/TRN BUS - EVCOIL/INJ Fuses
Odd Ignition Coils
Even Ignition Coils
Figure 4:

Odd Ignition Coils


Object Number: 1962329  Size: FS
Master Electrical Component List
Electronic Ignition (EI) System Description
Control Module References
Even Ignition Coils
Fuel Injectors
PWR/TRN Bus - Emission 2 and ODCOIL/INJ Fuses
Fuel Injectors
G103, G110, G111 and G112 (6.0L)
Figure 5:

Even Ignition Coils


Object Number: 1962330  Size: FS
Master Electrical Component List
Electronic Ignition (EI) System Description
Control Module References
Crankshaft Position and Knock Sensors
Odd Ignition Coils
PWR/TRN BUS - EVCOIL/INJ Fuses
Fuel Injectors
G103, G110, G111 and G112 (6.0L)
Figure 6:

Crankshaft Position and Knock Sensors


Object Number: 1962331  Size: FS
Master Electrical Component List
Knock Sensor (KS) System Description
Control Module References
Heated Oxygen Sensors
Even Ignition Coils
Engine Controls Schematic Icons
Engine Controls Schematic Icons
Figure 7:

Heated Oxygen Sensors


Object Number: 2012531  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
Camshaft Position Sensor, MAP Sensor, Reverse Lockout Solenoid, EVAP Canister Purge Solenoid, Coolant Temp Sensor, MAF Sensor, Oil Level and Temp Sensor and Backup Lamp Switch
Crankshaft Position and Knock Sensors
PWR/TRN Bus - ECM 1, Emission 1 and REV/LOCK Fuses
Camshaft Position Sensor, MAP Sensor, Reverse Lockout Solenoid, EVAP Canister Purge Solenoid, Coolant Temp Sensor, MAF Sensor, Oil Level and Temp Sensor and Backup Lamp Switch
Figure 8:

Camshaft Position Sensor, MAP Sensor, Reverse Lockout Solenoid, Evap Canister Purge Solenoid, Coolant Temp Sensor, MAF Sensor, Oil Level and Temp Sensor and Backup Lamp Switch


Object Number: 2012533  Size: FS
Master Electrical Component List
Electronic Ignition (EI) System Description
Control Module References
Throttle Body and APP Sensor
Heated Oxygen Sensors
Batt Main 2, Console Lighting, BCM Logic, Stop Lamps/Park Assist and IGNSW/Theft Fuses and Ignition Switch
B+ Bus - 2 of 2
G102 and G310
G103, G110, G111 and G112 (6.0L)
PWR/TRN Bus - ECM 1, Emission 1 and REV/LOCK Fuses
Batt Main 2, Console Lighting, BCM Logic, Stop Lamps/Park Assist and IGNSW/Theft Fuses and Ignition Switch
IGN II/III Bus - Airbag, IGN Engine and Phone/Cruise
IGN II/III Bus - Airbag, IGN Engine and Phone/Cruise
Heated Oxygen Sensors
ECM Power, Ground and Serial Data
G102 and G310
G102 and G310
Batt Main 2, Console Lighting, BCM Logic, Stop Lamps/Park Assist and IGNSW/Theft Fuses and Ignition Switch
Figure 9:

Throttle Body and APP Sensor


Object Number: 1962310  Size: FS
Master Electrical Component List
Throttle Actuator Control (TAC) System Description
Control Module References
ECM Inputs and Outputs
Camshaft Position Sensor, MAP Sensor, Reverse Lockout Solenoid, EVAP Canister Purge Solenoid, Coolant Temp Sensor, MAF Sensor, Oil Level and Temp Sensor and Backup Lamp Switch
Engine Controls Schematic Icons
Figure 10:

ECM Inputs and Outputs


Object Number: 2021923  Size: FS
Master Electrical Component List
Control Module References
Throttle Body and APP Sensor
Fuel Pump and Fuel Level Sensor
Battery, Starter and Ignition Switch, Inputs and Outputs
Battery Current Sensor and Generator, Inputs and Outputs
Module Power, Ground and Serial Data
Cooling Fans and Relays
Instrument Cluster Power, Ground, Serial Data, Inputs and Outputs
Body Control Module and Ignition Switch, Power, Ground, Inputs and Outputs
HVAC Module, Power, Ground, Serial Data, Inputs and Outputs
Stop Lamps Power and Ground
TCM and Transmission, Power, Ground, Serial Data, Inputs and Outputs
Figure 11:

Fuel Pump and Fuel Level Sensor


Object Number: 2012527  Size: FS
Master Electrical Component List
Fuel System Description
Control Module References
ECM Inputs and Outputs
G303, G304 and G308
G202
ECM, Fuel Pump, Rear Main, RVC Sense and Trailer Fuses